157. A number of linguists contend that all of the thousands of languages spoken by the world's five billion people can be traced back to a common root language.
(A) that all of the thousands of languages spoken by the world's five billion people can be traced
(B) that the world's five billion people speak thousands of languages of which all can be traced
(C) the world's five billion people speak thousands of languages which are all traceable
(D) all of the thousands of languages spoken by the world's five billion people to be traceable
(E) the ability to trace all of the thousands of languages that are spoken by the world's five billion people
A, the best choice, correctly (1) uses a noun clause introduced by that after contend, (2) keeps the "contention" clear by making all of the thousands of languages the subject of the noun clause （句子重心的问题）, and (3) precisely indicates the relationship of the thousands of languages to the common root language (they can be traced back to it). B and C produce convoluted and ill-focused sentences by making the world's five billion people the subject of the noun clause. The phrase of which all in B is unidiomatic (all of which is the idiom). C uses the wordy and indirect traceable back to. D incorrectly substitutes an infinitive clause for the "that" noun clause required after contend. E, in substituting a noun phrase, becomes incoherent and ungrammatical.
这道题本身没有什么好讨论的。但是我对OG中有些说法感到疑惑。 B and C produce convoluted and ill-focused sentences by making the world's five billion people the subject of the noun clause.
这里明明白白的说，把被动改为主动改变了文章的重心。但是在很多情况下，我发现，如果是该被动改为主动的时候它又会说被动的表达 unidiommatically redundent no referent 之类的话。我都有感觉自己给ETS那帮哥们玩了。 | 
